1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#ifndef HEADER_CURL_HTTP_H
#define HEADER_CURL_HTTP_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#ifndef CURL_DISABLE_HTTP
#ifdef USE_NGHTTP2
#include <nghttp2/nghttp2.h>
#endif
extern const struct Curl_handler Curl_handler_http;
#ifdef USE_SSL
extern const struct Curl_handler Curl_handler_https;
#endif
/* Header specific functions */
bool Curl_compareheader(const char *headerline, /* line to check */
const char *header, /* header keyword _with_ colon */
const char *content); /* content string to find */
char *Curl_copy_header_value(const char *header);
char *Curl_checkProxyheaders(const struct connectdata *conn,
const char *thisheader);
CURLcode Curl_buffer_send(struct dynbuf *in,
struct connectdata *conn,
curl_off_t *bytes_written,
size_t included_body_bytes,
int socketindex);
CURLcode Curl_add_timecondition(const struct connectdata *conn,
struct dynbuf *buf);
CURLcode Curl_add_custom_headers(struct connectdata *conn,
bool is_connect,
struct dynbuf *req_buffer);
CURLcode Curl_http_compile_trailers(struct curl_slist *trailers,
struct dynbuf *buf,
struct Curl_easy *handle);
/* protocol-specific functions set up to be called by the main engine */
CURLcode Curl_http(struct connectdata *conn, bool *done);
CURLcode Curl_http_done(struct connectdata *, CURLcode, bool premature);
CURLcode Curl_http_connect(struct connectdata *conn, bool *done);
/* These functions are in http.c */
CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy,
const char *auth);
CURLcode Curl_http_auth_act(struct connectdata *conn);
/* If only the PICKNONE bit is set, there has been a round-trip and we
selected to use no auth at all. Ie, we actively select no auth, as opposed
to not having one selected. The other CURLAUTH_* defines are present in the
public curl/curl.h header. */
#define CURLAUTH_PICKNONE (1<<30) /* don't use auth */
/* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST
data get included in the initial data chunk sent to the server. If the
data is larger than this, it will automatically get split up in multiple
system calls.
This value used to be fairly big (100K), but we must take into account that
if the server rejects the POST due for authentication reasons, this data
will always be unconditionally sent and thus it may not be larger than can
always be afforded to send twice.
It must not be greater than 64K to work on VMS.
*/
#ifndef MAX_INITIAL_POST_SIZE
#define MAX_INITIAL_POST_SIZE (64*1024)
#endif
/* EXPECT_100_THRESHOLD is the request body size limit for when libcurl will
* automatically add an "Expect: 100-continue" header in HTTP requests. When
* the size is unknown, it will always add it.
*
*/
#ifndef EXPECT_100_THRESHOLD
#define EXPECT_100_THRESHOLD (1024*1024)
#endif
#endif /* CURL_DISABLE_HTTP */
#ifdef USE_NGHTTP3
struct h3out; /* see ngtcp2 */
#endif
/****************************************************************************
* HTTP unique setup
***************************************************************************/
struct HTTP {
curl_mimepart *sendit;
curl_off_t postsize; /* off_t to handle large file sizes */
const char *postdata;
const char *p_pragma; /* Pragma: string */
const char *p_accept; /* Accept: string */
/* For FORM posting */
curl_mimepart form;
struct back {
curl_read_callback fread_func; /* backup storage for fread pointer */
void *fread_in; /* backup storage for fread_in pointer */
const char *postdata;
curl_off_t postsize;
} backup;
enum {
HTTPSEND_NADA, /* init */
HTTPSEND_REQUEST, /* sending a request */
HTTPSEND_BODY, /* sending body */
HTTPSEND_LAST /* never use this */
} sending;
#ifndef CURL_DISABLE_HTTP
struct dynbuf send_buffer; /* used if the request couldn't be sent in one
chunk, points to an allocated send_buffer
struct */
#endif
#ifdef USE_NGHTTP2
/*********** for HTTP/2 we store stream-local data here *************/
int32_t stream_id; /* stream we are interested in */
bool bodystarted;
/* We store non-final and final response headers here, per-stream */
struct dynbuf header_recvbuf;
size_t nread_header_recvbuf; /* number of bytes in header_recvbuf fed into
upper layer */
struct dynbuf trailer_recvbuf;
int status_code; /* HTTP status code */
const uint8_t *pausedata; /* pointer to data received in on_data_chunk */
size_t pauselen; /* the number of bytes left in data */
bool close_handled; /* TRUE if stream closure is handled by libcurl */
char **push_headers; /* allocated array */
size_t push_headers_used; /* number of entries filled in */
size_t push_headers_alloc; /* number of entries allocated */
#endif
#if defined(USE_NGHTTP2) || defined(USE_NGHTTP3)
bool closed; /* TRUE on HTTP2 stream close */
char *mem; /* points to a buffer in memory to store received data */
size_t len; /* size of the buffer 'mem' points to */
size_t memlen; /* size of data copied to mem */
#endif
#if defined(USE_NGHTTP2) || defined(ENABLE_QUIC)
/* fields used by both HTTP/2 and HTTP/3 */
const uint8_t *upload_mem; /* points to a buffer to read from */
size_t upload_len; /* size of the buffer 'upload_mem' points to */
curl_off_t upload_left; /* number of bytes left to upload */
#endif
#ifdef ENABLE_QUIC
/*********** for HTTP/3 we store stream-local data here *************/
int64_t stream3_id; /* stream we are interested in */
bool firstheader; /* FALSE until headers arrive */
bool firstbody; /* FALSE until body arrives */
bool h3req; /* FALSE until request is issued */
bool upload_done;
#endif
#ifdef USE_NGHTTP3
size_t unacked_window;
struct h3out *h3out; /* per-stream buffers for upload */
struct dynbuf overflow; /* excess data received during a single Curl_read */
#endif
};
#ifdef USE_NGHTTP2
/* h2 settings for this connection */
struct h2settings {
uint32_t max_concurrent_streams;
bool enable_push;
};
#endif
struct http_conn {
#ifdef USE_NGHTTP2
#define H2_BINSETTINGS_LEN 80
nghttp2_session *h2;
uint8_t binsettings[H2_BINSETTINGS_LEN];
size_t binlen; /* length of the binsettings data */
Curl_send *send_underlying; /* underlying send Curl_send callback */
Curl_recv *recv_underlying; /* underlying recv Curl_recv callback */
char *inbuf; /* buffer to receive data from underlying socket */
size_t inbuflen; /* number of bytes filled in inbuf */
size_t nread_inbuf; /* number of bytes read from in inbuf */
/* We need separate buffer for transmission and reception because we
may call nghttp2_session_send() after the
nghttp2_session_mem_recv() but mem buffer is still not full. In
this case, we wrongly sends the content of mem buffer if we share
them for both cases. */
int32_t pause_stream_id; /* stream ID which paused
nghttp2_session_mem_recv */
size_t drain_total; /* sum of all stream's UrlState.drain */
/* this is a hash of all individual streams (Curl_easy structs) */
struct h2settings settings;
/* list of settings that will be sent */
nghttp2_settings_entry local_settings[3];
size_t local_settings_num;
uint32_t error_code; /* HTTP/2 error code */
#else
int unused; /* prevent a compiler warning */
#endif
};
CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
struct connectdata *conn,
ssize_t *nread,
bool *stop_reading);
/**
* Curl_http_output_auth() setups the authentication headers for the
* host/proxy and the correct authentication
* method. conn->data->state.authdone is set to TRUE when authentication is
* done.
*
* @param conn all information about the current connection
* @param request pointer to the request keyword
* @param path pointer to the requested path
* @param proxytunnel boolean if this is the request setting up a "proxy
* tunnel"
*
* @returns CURLcode
*/
CURLcode
Curl_http_output_auth(struct connectdata *conn,
const char *request,
const char *path,
bool proxytunnel); /* TRUE if this is the request setting
up the proxy tunnel */
#endif /* HEADER_CURL_HTTP_H */
|
